1. Product Overview:
XWGType Non-Pressure Water Supply Equipment is a complete water supply system developed by our professional technicians at Yangtze River Pump Industry Company based on pressure water supply equipment. It can be directly connected to the municipal water supply network without causing any adverse effects on the municipal water supply system. It replaces water storage tanks and rooftop tanks, fully utilizing the pressure of the water supply network for direct or indirect water supply, avoiding secondary waste of energy and secondary pollution of water quality, significantly saving infrastructure costs and shortening construction periods.
XWGType Non-Pressure Water Supply Equipment consists of an intelligent variable frequency control cabinet, a steady flow tank, a pump unit, instruments, valves, pipelines, bases, etc., applicable for all water supply systems that require increased water pressure and constant flow.
When the WB type non-pressure water supply equipment is in normal operation, water from the municipal network enters the non-pressure steady flow tank, and air inside the tank is expelled through the exhaust valve. When the air is fully discharged, the float in the valve rises, moving the sealing head to the closed position, gradually closing the exhaust port and stopping the air discharge to prevent water outflow. When water flows normally in the steady flow tank, if a small amount of air accumulates in the valve to a certain extent, the water level in the valve decreases, causing the float to lower, and at this point, air is expelled through the exhaust hole.
XWG Type Non-Pressure Water Supply Equipment operates normally, and when the municipal water supply is insufficient, or when the water pressure in the steady flow tank is lower than atmospheric pressure, the water level in the steady flow tank drops, causing the float to lower, which opens the sealing head to draw in air, maintaining atmospheric pressure in the steady flow tank to prevent negative pressure on the municipal network.
When the pressure in the municipal network is lower than the required set pressure for users, the pump operates with variable frequency speed control to ensure that the pressure in the user’s network meets water requirements. The higher the pressure in the municipal network, the lower the pump speed; conversely, the lower the pressure, the higher the pump speed. When the municipal water supply pressure reaches the user’s requirements, the WB type non-pressure water supply equipment automatically stops working, and municipal water is supplied directly to users through a bypass pipe.
In the event of a municipal water outage, the water level in the steady flow tank gradually decreases; when it reaches a low level, the level gauge on the steady flow tank sends a shutdown signal, and the XWG Type Non-Pressure Water Supply Equipment automatically stops operation and displays a water shortage protection signal.
When there is a power outage, the XWGNon-Pressure Water Supply Equipment shuts down, and water from the municipal network is supplied directly to users through the XWGNon-Pressure Water Supply Equipment bypass pipe.
2. Product Features:
1、No need to build a water tank, energy-saving, cost-saving:
XWGType Non-Pressure Water Supply Equipmentis economical and sanitary, with significant energy-saving effects. Practical evidence shows that using the intelligent non-pressure steady flow water supply equipment can save over 50% of the costs for constructing new water tanks, and compared to other water supply equipment, it can save 20% to 40%.
2、Easy installation, saves space:
XWGType Non-Pressure Water Supply Equipment can be configured with either horizontal steady flow tanks or vertical steady flow tanks. Both types of steady flow tanks have different characteristics: horizontal tanks occupy less space, while vertical tanks have a smaller footprint. The manufacturing and testing of the steady flow tanks comply with GB150 "Steel Pressure Vessel" regulations, and the interior of the tanks uses advanced “841 epoxy polyamide food-grade coating for corrosion protection, which meets national food hygiene standards.
3、Wide application, strong adaptability:
XWGType Non-Pressure Water Supply Equipment can be used for domestic water supply, fire-fighting water supply, and can be configured with any model of water pump. When the equipment is used for fire-fighting, it is advisable to equip it with fire-specific water pumps.
4、Comprehensive functions, high degree of automation:
XWGType Non-Pressure Water Supply Equipment adopts advanced human-machine variable frequency control technology, with soft start, overload, short-circuit, over-voltage, under-voltage, phase loss, overheating, and stall protection functions. In abnormal situations, it provides signal alarms, self-checking, fault diagnosis, and automatically adjusts water supply flow based on water consumption.
5、Advanced product, reliable quality:
XWGType Non-Pressure Water Supply Equipment uses components that have been screened by numerous manufacturers, ensuring reliable quality. Key components in the product, such as motors, pump bearings, variable frequency drives, circuit breakers, contactors, relays, etc., are sourced from internationally and domestically recognized products.
3. Installation and Debugging:
1, The equipment foundation dimensions should be constructed according to the foundation drawings provided by the manufacturer, and its position and standards should comply with the engineering design andTJ231 "Quality Requirements for Equipment Foundation Dimensions and Positions".
2, After positioning the equipment, use a level to ensure it is flat, with the longitudinal and lateral levels being less than0.1%.
3, After leveling the equipment, use expansion cement for secondary grouting of the foundation, and maintenance should be done for24 hours before proceeding with piping.
4, After wiring the motor, confirm the rotation direction to ensure it is consistent with the standard arrow.
4. Usage and Operation:
1, Before using the equipment, manually rotate the pump rotor to ensure there is no friction or jamming.
2, Use a 500V low-voltage megohmmeter to test the motor insulation, which should be above0.5M.
3, Control instruments and wiring should show no damage.
4, Fully open the pump inlet valve, close the outlet valve, and gradually open the pump's exhaust valves. Once the pump chamber is filled with liquid, close the air valve.
5, Set the switch to manual position, and jog the pump under no load; its operating direction should be consistent with the standard arrow.
6, Manually start and stop each pump, checking for any abnormal operations.
5. Maintenance and Care:
1, Before the equipment is put into operation, the system should be cleaned and blown out to prevent impurities from entering the pump and causing damage.
2, The pump should not run for extended periods with the outlet valve fully closed, nor should it run at the peak of its performance curve, and it must not run dry. When the shaft seal uses packing seals, a leakage of 10~20 drops/min is acceptable.
3, The bearing temperature during operation should not exceed75 degrees Celsius.
4, The bearings should be lubricated every500 hours of operation.
5, If the equipment is not used for a long time, necessary measures should be taken to prevent contamination and rust, and winter shutdowns should use antifreeze and insulation measures.
6, Running equipment should implement preliminary sewage discharge according to water quality conditions.
6. Characteristics of Non-Pressure Water Supply Equipment
1, Two operating modes:
Automatic working mode: This mode operates under normal water supply conditions. Generally, when customers have normal water supply, this mode is selected. In automatic mode, all different water supply requirements of the pipeline network are effectively controlled by the non-pressure water supply equipment to adapt to multiple functional needs.
Manual working mode: This mode is an emergency setting for users when the automatic mode fails. It allows for straightforward starting and stopping of any pump motor directly from the control panel, typically used only in case of automatic failure or during debugging.
2, Easily integrated into intelligent management systems, the main components use reliable components, and the entire system has high reliability and anti-interference capability. Its standard serial communication port (RS485) makes communication with computers very convenient.
3, Water level protection function: When the water level in the tank is below the set level, the system automatically protects and stops operation. The liquid level controller is stable and reliable.
4, Automatic reset function: The system automatically starts up when power is restored after a power outage or when the water level returns to normal.
5, Faulty pump shielding function: When a pump fails, it is directly removed from the operating program, and a backup pump takes over the work.
6, Automatic protection functions: Includes overload, overcurrent, short circuit, phase loss, overpressure, underpressure, and water shortage shutdown protections.
